In the following situation solo function does not work anymore:1. Open a song of your choice.2. Switch one track of this song to solo by tapping on the "S" button.3. Unload Music Studio 2 from memory.4. Reload Music Studio 2.

After reloading, Music Studio remembers the last loaded song and even the activated solo function. But you'll learn, that all the other tracks are not grayed out and also the solo function does not work anymore.